| self-contained(adjective, cool, blank, aloof, unemotional) |
| self-satisfied(adjective, calm, cool, steady, tranquil) |
| silent(adjective, indifferent, detached, distant, apathetic) |
| smug(adjective, calm, cool, steady, tranquil) |
| spiritless(adjective, cool, blank, aloof, unemotional) |
| stiff upper lip(expression, adjective, idiom, calm, cool) |
| stony(adjective, cold, indifferent, impassive, steadfast) |
| subdued(adjective, calm, quiet, gentle, yielding) |
| submissive(adjective, calm, quiet, understanding, gentle) |
| subservient(adjective, calm, quiet, gentle, ready) |
| supercilious(adjective, indifferent, detached, distant, apathetic) |
| superior(adjective, indifferent, detached, distant, apathetic) |
| surviving(adjective, persevering) |
| tame(adjective, calm, quiet, gentle, subdued) |
| tenacious(adjective, persevering) |
| thick-skinned(adjective, calm, cool, steady, tranquil) |
| tolerant(adjective, calm, quiet, understanding, gentle) |
| tractable(adjective, quiet, gentle, subdued, yielding) |
| unaffected(adjective, calm, cool, cold, indifferent) |
| unaroused(adjective, indifferent, detached, distant, apathetic) |